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[xsl] The time to execute a function is 625 times greater than the sum of the times to execute the statements in the function

2020-08-01 14:03:35
Hi Folks,

I am having great difficulty determining why my XSLT neural network program 
runs so slow. I am currently focusing on the f:train function. The Saxon 
profile tool reports the gross total time for one call to the f:train function 
is 5,460.326 ms.

To see how much time each statement in f:train takes, Michael Müller-Hillebrand 
suggested that I put each statement into its own function. Great idea! I did 
so. I ran the Saxon profile tool on the modified f:train and you can see below 
the gross total time required for each statement (each statement is now in its 
own function). I summed their times and it came to a total of 8.742 ms. So, the 
f:train function should take 8.742 ms but instead it takes 5,460.326 ms. How 
can it possibly be that the time to execute the f:train function is 625 times 
greater than the sum of the times to execute the statements in the function? 
Any suggestions?

/Roger

f:count-inputs-list                                             0.016
f:create-inputs                                                 0.039
f:count-targets-list                                            0.004
f:create-targets                                                        0.520
f:create-hidden-inputs                                          0.060
f:create-hidden-outputs                                         0.058
f:create-final-inputs                                           0.054
f:create-final-outputs                                          0.008
f:compute-output-errors                                 0.025
f:compute-hidden-layer-errors                                   2.612
f:compute-Ek_times_Ok                                   0.030
f:compute-One_minus_Ok                                  0.017
f:compute-updated-layer-values                          0.003
f:compute-output-transposed                                     0.003
f:compute-weight-changes                                        0.003
f:compute-learning-rate-multiplied-by-weight-changes            0.100
f:compute-updated-who                                   0.034
f:compute-Ek_times_Ok-v2                                        0.006
f:compute-One_minus_Ok-v2                                       0.008
f:compute-updated-layer-values-v2                               0.006
f:compute-output-transposed-v2                          0.004
f:compute-weight-changes-v2                                     0.004
f:compute-learning-rate-multiplied-by-weight-changes-v2 0.060
f:compute-updated-wih                                           0.027
f:compute-neural-network-with-new-wih                   4.959
f:compute-neural-network-with-new-wih-and-new-who               0.085
Total Time:                                                     8.742
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